Metal-planer



o. T. LANMAN.

METAL PLANER. No.260,211; Patented June 27, 1882:,

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UNITED STATES PATENT OFFICE.

.1 CHARLES T. LANMAN, OF BROOKLINE, MASSACHUSETTS.

METAL-PLANER.

SPECIFICATION forming part of Letters Patent No. 260,211, dated June 27, 1882.

Application filed February 18, 1882. No model.)

To all whom it may concern.-

Be it known that I, C HARLES T. LANMAN, of Brookline, in the county of Norfolk and State of Massachusetts, have invented a new and useful Improvement in Metal-Planers, of

which the following is a full, clear, and exact description.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a front elevation of my improvement shown as applied to an ordinary planer. Fig. 2 is a side elevation of the same, partly in section through the broken line mm, Fig. 1. Fig. 3 is a sectional front elevation of the improvement, taken through the line 3 y, Fig. 2. Fig. 4 represents the pawl, ratchet, and gearwheel for operating the screw that gives lateral motion to'the tool-carrying mechanism. Fig. 5 is an elevation of the guide-rack and the mechanism to keep the said rack in-place. Fig. 6 shows a modification of the mechanism for operating the guide-rack.

. This invention has especial reference to machines for planing irregular forms, and has for its object to cause the. planing-tool to rise and fall automatically to give the required shape to the work.

The invention consists in the combination,

with the tool-holder and the laterally-movin g frame carrying the said tool-holder, of a swivcled screw, a rack-bar having a small wheel pivoted to its lower end, and a train of gearwheels connecting the said screw and rackbar, whereby the tool will be raised and lowered automatically togive the required form tothe work and, also, in the combination, with the rack-bar and the laterally-moving frame that carries it, of rollers resting against the rear-edge of the rack-bar and pairs of rollers and their hands resting against the forward or toothed edge of the said rack-bar, whereby the rack-bar is kept in position and made to move with the least possible friction, as will be hereinafter fully described.

Av represents the base-frame of the machine, upon the top of which rests and slides the table B. To the table B is secured in the ordinary manner the work 0 to be planed. To the lower side of the table B is attached,or

which mesh into the teeth of the large gearwhcel E, jourualed to the base-frame A. The teeth of the gear-wheel E mesh into the teeth of'a smaller gear-wheel, F, attached to the shaft G, to which motion may be given from any convenient power.

His the planing-tool, which is clamped to a holder, I. The holder I rests against and slides up and down upon the front of a frame or case, J. Upon the inner side of the holder I is formed a nut, K, which projects through a slot in the case or frame J, to receive the screw L, so that the cutter can be fed up or down by turning the said screw L. The frame upon it is formed, a rack-bar, D, the tceth of i J rests and slides upon a cross-bar, M, the ends of which have screw-holes formed in them to receive the screws N, so that the said frame and its attachments caube raised and lowered by turning the said screws N. The screws N are swiveled to an upright frame, 0, the lower end of which is attached to the central part of the base-frame A.

To'the upper ends of the screws N are attached beveled-gear wheels P, the teeth of which mesh into the teeth of the beveled-gear wheels Q. The gear-wheels Q are attached to a horizontal shaft, R, which revolves in bearings attached to the upper end of the frame 0, and to one end of the said shaft R is attached a hand-wheel or crank, S, b v means of which the said shaft R can be readily turned.

To the swiveled screw L, at the top of the frame J, is attached a ratchetwheel, T, with the teeth of which engage the teeth of a double lever-pawl, U, pivoted to the smooth upper part of the said swiveled screw L.

To the double lever-pawl U is pivoted the endof a connecting-rod, V, the other end of which is pivoted to the arm W,rigidly attached to the rod X, so that the swiveled screw L will be turned forward by rocking the saidrod X. The rod X works in bearings attached to the frame J, and upon the said rod X slides the inner end of the 1everY,the outer end of which is pivoted to the upper end of the rack-bar Z. The rack-bar Z slides upon guides attached to the upright frame'O, and to the lower end of the said bar is pivoted the upper end'of a connecting-rod, a, the lower end of which is connected adjustably with the journal of the gearwheel E by a slotted crankarm, b, or other suitable means. With this construction the screw L will be turned automatically to feed the cutter H up or down to its work.

To the upper end of the swiveled screw L is attached a hand-wheel or crank, c, for convenience in turning the screw L to raise the cutter H away from the work or to adjust it to the thickness of the work or for a hand-feed. The teeth of the rack-bar Z meshinto the teeth of a gear-wheel, d, that works loose upon the shank or smooth part of the screw 0, and is provided with a double pawl, f, which engages with the teeth of a ratchet-wheel, g, rigidly attached to the said shank of the screw 6, so that the screw 0 will be turned forward or backward by the reciprocating movement of the rack-bar Z. The screw 0 is swiveled to the cross-head M and passes through a not attached to or a screw-hole formed in the rear part of the frameJ,so that the said frame will receive a lateral movement by the revolution of the screw 0.

To the end of the screw eis attached a hand wheel or crank, h, for convenience in adjusting the frame J in any desired position.

To the upper part of the screw L is attached a beveled-gear wheel, i, the teeth of which mesh into the teeth of the beveled-gear wheel The gear-wheelj is journaled to the frame J, and with the said gear-wheelj is rigidly connected a small gear-wheel, k, the teeth of which mesh into the teeth of the larger gearwheel l, journaled to the frame J. With the gearwheel lis rigidly connected a small gear-wheel, m, the teeth of which mesh into the teeth of the larger gear-wheel n, journaled to the frame J. With the gear-wheelie is rigidly connected a small gear-wheel, o, the teeth of which mesh into the teeth of an upright rack-bar, 1).

To the lower end of the rack-bar p is pivoted a small wheel, g, which rolls along a pattern, 1', of the exact form to be given to the work. The pattern r is secured to a table, 8, attached to the upright frame 0.

The gear-wheels ij 70 l m n 0 are so constructed as to size and number of teeth that the tool H will be raised the same distance as the rack-bar p rises when the pattern is of the full size of the required work.

If desired, the gear-wheels can be constructed to raise the tool more or less than the rack-bar p, in the ratio in which the pattern is less or greater than the required work. I

The rear edge of the rack-harp rests against a number of rollers, t, pivoted to the frame or case J, and the toothed forward edge of the said rack-barp rests against two bands,u,passiug around pairs of rollersv, one pair of rollers and their band being placed above the gearwheel 0 and the other pair of rollers and their band being placed below the said gear-wheel 0, as shown in Fig.5. With this construction the rack-bar 11 will be kept in place and made to move up and down with the least possible amount of friction.

If desired,- the-pattern i" may be omitted and the wheel q replaced by an irregular wheehw, to roll upon a plain surface, and so formed as to raise and lower the rack-bar p at the proper times and to the necessary extent.

Having thus fully'describcd my invention, I claim as new and desire to secure by Letters Patent- 1. In a metal-planer, the combination, with the tool-holder I and the laterally-moving frame J, of the swiveled screw L, the rackbar 12, having wheel q, and the connecting gearwheels, substantially as herein shown and described, whereby the tool will be raised and lowered automatically to give the required form to the work, as set forth.

2. In a metal-planer, the combination, with the rack-bar p and the frame J, of the rollers t and the pairs of rollers v and their bands u, substantially as herein shown and described, whereby the said rack is kept in position and made to move with the leastpossible friction, as set forth.

CHARLES T. LANMAN- Witnesses: 7

PETER W. PIERCE, LUTHER BRIGGS. 

